V2Wizard: Implement <Aws> subset of Image Output step

DDF has been dropped, RTK being used for state management now.

src/Components/CreateImageWizardV2/validators.ts

@@ -0,0 +1,10 @@
+export const isAwsAccountIdValid = (awsAccountId: string | undefined) => {
+  if (
+    awsAccountId !== undefined &&
+    /^\d+$/.test(awsAccountId) &&
+    awsAccountId.length === 12
+  ) {
+    return true;
+  }
+  return false;
+};